Knockdown jack assembly

ABSTRACT

A knockdown jack assembly for elevating a suburban type riding tractor and the like. The assembly includes a conventional automotive jack having an upright standard with teeth along one surface and a lever actuated lift mechanism, a guide member disposed in parallel relation to the standard and a lift assembly slidable on the guide member, the lift assembly being detachably connected to the lift mechanism whereby movement of the lift mechanism will effect corresponding movement of the lift assembly which is adapted to support the vehicle.

Reid

[11] 3,834,669 1451 Sept. 10,1974

KNOCKDOWN JACK ASSEMBLY Primary Examiner-Al Lawrence Smith I R B t 1Assistant Examiner-Robert C. Watson [75] mentor Jay amng I] Attorney,Agent, or Firm-Arnste1n, Gluck, [73] Assignee: SlTars, Roebuck and Co.,Chicago, Weitzenfeld & Mino [21] Appl 331L801 A knockdown jack assemblyfor elevating a suburban type riding tractor and the like. The assemblyincludes [52] US. Cl. 254/133 a conventional automotive jack having anupright [51] Int. Cl B66f 3/00 Standard with teeth along one surface anda lever ac- [58] Field of Search 254/DIG. l, 131, 133 tuated liftmechanism, a guide member disposed in parallel relation to the standardand a lift assembly [56] References Cited slidable on the guide member,the lift assembly being UNITED STATES PATENTS detachably connected tothe lift mechanism whereby 1292 823 1/1919 Livesa 254/133 R movement ofthe lift mechanism will effect corre- 2274794 3/1942 10161162I:IIII. III254/010. 1 Sponding movement of h lift assembly which is 2,616,65011/1952 Thompson 254/110. 1 adapted to pp the vehlcle- 2,882,0l2 4 1959L 54 l R Una l 33 5 Claims, 7 Drawing Figures X Q I,

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1 i 1 l i 6 V .2/ i fi3 PATENIED SEPI 0:914

SHEEI 2 BF 2 IQNOCKDOWN JACK ASSEMBLY BACKGROUND OF THE INVENTION Thisinvention relates to a knockdown jack assembly for elevating suburbantype tractors and the like.

Suburban riding type tractors are designed to accept for mounting avariety of attachments for performing different functions. Theinstallation of certain of such attachments requires the elevation ofthe tractor above ground level. Heretofore, no satisfactory liftingdevices intended particularly for use on tractors of the type underconsideration have been available. Generally, such devices haveconsisted of various types of conventional jacks intended for use onautomobiles which present conditions very different from those found insuburban type riding tractors. As a result, the use of such conventionaljacks, in many instances may be hazardous with the possibility of injuryto the operator.

Accordingly, it is an object of the present invention to provide a jackassembly adapted particularly for use with suburban type riding tractorsand the like.

Another object of this invention is the provision of a jack assembly ofthe foregoing type which affords a high degree of safety in its use andoperation.

A further object of this invention is the provision of a jack of theforegoing type which may be stored in knockdown condition and readilyassembled for use.

Still a further object of this invention is the provision of a jack ofthe foregoing type which is simple in construction and efficient inoperation.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. l is a side elevational view of ajack assembly, in accordance with my invention, showing the same appliedto garden type riding tractor, shown in broken lines.

FIG. 2 is a top plan view of the jack assembly shown in FIG. ll.

FIG. 3 is a rear elevational view thereof.

FIG. 4 is a cross-sectional view, on an enlarged scale, of a detail,taken substantially on line 4l4 of FIG. 2.

FIG. 5 is a cross-sectional view taken substantially on line 5-5 of FIG.4.

FIG. 6 is an exploded perspective view of the jack assembly; and

FIG. 7 is a perspective view showing certain of the parts in collapsedrelation.

BRIEF DESCRIPTION OF A PREFERRED EMBODIMENT Referring to the drawing,the numeral 10 indicates, generally, a main support assembly comprisinga vertical guide column 11 formed preferably of tubing rectangular incross-section and welded at the bottom to a base plate 12 to which issecured a socket member 13 in spaced relation to the column 111. Thesocket member 13 provides a generally square receptacle for the lowerend of a jack member, hereinafter to be described. A pair of metalplates 14 are welded to the column H and to the base member 12 andextend in an opposite direction from the socket member l3. Receivedbetween the plates 14 is tubular leg 16, substantially like the column11. This leg is pivotally secured between the plates 14 by a pin 17passing through registering apertures 19 in the plates. The plates areprovided with another pair of coaxially disposed apertures 18 which areadapted to register with corresponding apertures 20 in the leg 16 whenthe leg is disposed in horizontal position, as illustrated in FIG. 6 toreceive a pin 17 which locks the two parts in a right angle relation. Anangle foot member 21 is welded to the distal end of the leg 16 andextends laterally on both sides thereof to afford lateral support forthe jack assembly so that it is free standing. It will be understoodthat the leg 16 may be compactly folded to the position illustrated inFIG. 7 parallel to the column 11 for storage.

The lift assembly 22 includes a generally U-shaped member 23 formed oftubular sections welded together and comprising a cross bar 24 and apair of parallel arms 26 on the ends of which are welded arcuatesections 27 constituting cradle elements. Welded to the cross bar 24,medially thereof, are a pair of parallel plates 28 spaced apart adistance sufficient to slidably receive therebetween the column llll. Apair of guide rollers 29, each rotatably mounted. on a respective pin 31secured in the plates 28 are arranged to engage opposite faces of thecolumn 11 as illustrated in FIG. 4. It will be seen that the placementof the rollers 29 is such as to counteract the force applied on the arms26 when the same are under stress. Each of the plates 28 is providedwith an aperture 30, the apertures 30 being in horizontal registrationand arranged to receive a removable pin 32, as hereinafter will beexplained.

The jack unit 33 is generally conventional and is of the type commonlyused for elevating an automobile, as when changing a tire. The unit 33includes a square tubular standard 35 having, on one face thereof, aseries of struck out teeth 36 and having a cooperating lift mechanism 37actuated by a jack handle 38. The lift mechanism 37, preferably,includes a pair of spaced plates 39, the spacing of the plates beingsuch that they are received between the plates 28. The plates 39 includea pair of apertures 41 coaxially disposed and of a size to register withthe apertures 30 in the plates 28 so as to receive the pin 32. Thestandard 35 is arranged to be received in the socket member l3 when inassembled relation.

When not in use, the components of my jack assembly may be readily takenapart and placed in a generally flat receptacle to occupy a minimum ofstorage space.

In assembling the jack for use, the leg 16 is rocked from the collapsedcondition shown in FIG. 7 to the erected condition shown in FIG. 6 andthe pin 19 inserted through registering apertures 18 and 20 to lock thetwo members in a rigid right angle relation. A wire cotter pin 19apassed through the opening in the pin prevents inadvertent displacementof the pin. The lift assembly 22 is then mounted on the tubular columnll 1 with the column passing between the plates 28 and the rollers 29 asillustrated in FIG. 4. The lower end of the standard 35 of the jack unitis inserted in the socket 13 and the lift assembly 22 is moved on thecolumn 11 to effect registration of the apertures in plates 28 with theapertures 41 of plates 39, after which the pin 32 is inserted andsecured with a cotter pin. Thus, the column ill and standard 35 aredisposed in parallel relation as illustrated in FIG. 1 and the entireassembly is free standing. The jack is operated in a conventional mannerto effect lifting of a vehicle to a desired height.

Various changes coming within the spirit of my invention may suggestthemselves to those skilled in the art; hence, I do not wish to belimited to the specific embodiments shown and described or usesmentioned, but intend the same to be merely exemplary, the scope of myinvention being limited only by the appended claims.

l claim:

1. In combination with an automotive jack having an upright standardhaving a series of teeth and a cooperating lever actuated liftmechanism, the improvement which comprises, a ground engaging basemember, an upright guide member supported on said base member, the basemember constituting a lateral extension of the upright guide member anddirected towards the load to be elevated, a ground engaging supportmember rigid with said base member and constituting an extension of thebase member in an opposite direction, said support member arranged tosupport said upright standard in parallel relation to said guide member,a lift assembly embracing said guide member and slidable thereon, saidlift assembly including a pair of parallel plates embracing oppositeside walls of said guide member and a pair of rollers journalled in saidplates and embracing front and rear walls of said guide member, andmeans connecting said lift assembly to said lift mechanism wherebymovement of said lift mechanism will effect corresponding movement ofsaid lift assembly.

2. The invention as defined in claim 1 in which the support membercomprises a socket.

3. The invention as defined in claim 1 including a T- shaped legpivotally connected to said base member and means to lock said leg in aposition normal to said guide member.

4. The invention as defined in claim 1 in which the lift assemblyincludes a pair of parallel arms arranged to support the load to beelevated.

5. The invention as defined in claim 1 in which the means connecting thelift assembly to the lift mechanism comprises a pin arranged to bereceived in registering apertures provided in said parallel plates andin said lift mechanism.

1. In combination with an automotive jack having an upright standardhaving a series of teeth and a cooperating lever actuated liftmechanism, the improvement which comprises, a ground engaging basemember, an upright guide member supported on said base member, the basemember constituting a lateral extension of the upright guide member anddirected towards the load to be elevated, a ground engaging supportmember rigid with said base member and constituting an extension of thebase member in an opposite direction, said support member arranged tosupport said upright standard in parallel relation to said guide member,a lift assembly embracing said guide member and slidable thereon, saidlift assembly including a pair of parallel plates embracing oppositeside walls of said guide member and a pair of rollers journalled in saidplates and embracing front and rear walls of said guide member, andmeans connecting said lift assembly to said lift mechanism wherebymovement of said lift mechanism will effect corresponding movement ofsaid lift assembly.
 2. The invention as defined in claim 1 in which thesupport member comprises a socket.
 3. The invention as defined in claim1 including a T-shaped leg pivotally connected to said base member andmeans to lock said leg in a position normal to said guide member.
 4. Theinvention as defined in claim 1 in which the lift assembly includes apair of parallel arms arranged to support the load to be elevated. 5.The invention as defined in claim 1 in which the means connecting thelift assembly to the lift mechanism comprises a pin arranged to bereceived in registering apertures provided in said parallel plates andin said lift mechanism.